Is it worth doing an IMC or is it going to be ditched sooner or later?
I do not see any reason why you shouldn't go for the IR now except money.
You have to many question marks at this moment about a LIR (light instrument rating ?) or MIR (minimum istrument rating?)
If you will need to study or train to hard now, i guess you will be happy when your in the coulds sweating your pants off in unexpected bad weather and surviving it due to your intense training.
I myself will immediatly as soon as possible after my PPL go into IR because of the reasons IO540 wrote. Just go for it!